Exporting KML Files
|Top Previous Next|
KML files are used by Google Earth and other programs to display specialized information in maps and geographic information programs. In the case of Compass, the KML files can be used to display Cave Survey Data in Google Earth. When you export a KML file from Compass and view it in Google Earth, the cave is displayed as passage outlines on the surface of the earth. This is because Google Earth does not allow you to see any object below the surface of the Earth.
The Exporting Process. Please be aware that there are several new requirements that must be met before a cave can be exported as KML file. He is a step-by-step description of the export process:
1. Geo-reference. Before you can export a KML file of your cave data, the cave must be "Geo-referenced". This means that entrance or some other portion of the cave must be connected to the surface location by specifying the location in Longitude/Latitude or UTM coordinates. This is done in the Compass Project Manager and the process is described in detail in the Project Manager Help files.
2. Recompile Project. The data necessary for the KML file is only produced by the latest version of the Project Manager. For this reason, you must reprocess your files. First, make sure that you are running the latest version of Compass. Second, load the project into the Project Manager and re-save it. This will write additional data to the Project File. Finally, recompile all your data. You do this by enabling the "Always" option under the "Compile When:" box on the front of the Project Manager and then pressing the "Process and View Cave" button.
3. Exporting. From the Compass Viewer, select the "File -> Export 3D Formats" options from the menu bar. Go to the KML and page and set your preferences for Fill and Line Colors
4. Viewing KML Files. You must have Google Earth installed on your computer to view the KML files. If you don't have Google Earth installed, go here http://earth.google.com/ and follow the instructions. Once Google Earth is installed, simply double click on the KML files and Google Earth will zoom in on the cave location and display the cave.